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Subsequent Events (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended 0 Months Ended 60 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
May 20, 2015
May 08, 2015
Apr. 28, 2015
Apr. 21, 2015
Apr. 07, 2015
Sep. 30, 2021
Subsequent Event [Line Items]                    
Dividends declared, in dollars per share $ 0.0175us-gaap_CommonStockDividendsPerShareDeclared $ 0.0175us-gaap_CommonStockDividendsPerShareDeclared $ 0.0350us-gaap_CommonStockDividendsPerShareDeclared $ 0.0350us-gaap_CommonStockDividendsPerShareDeclared            
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Derivative, Inception Date                 Apr. 07, 2015  
Debt Instrument, Maturity Date Range, Start                   Sep. 30, 2016
Derivative, Amount of Hedged Item                 $ 150.0us-gaap_DerivativeAmountOfHedgedItem
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Debt Instrument, Interest Rate, Effective Percentage                 5.591%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Debt Instrument, Maturity Date Range, End                   Sep. 30, 2021
Dividends Payable, Date Declared               Apr. 21, 2015    
Dividends declared, in dollars per share               $ 0.0200us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Dividends Payable, Date to be Paid         May 20, 2015          
Dividends Payable, Date of Record           May 08, 2015        
Subsequent Event, Date             Apr. 28, 2015      
Stock Repurchase Program, Authorized Amount             $ 50.0us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember